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Short animation illustrating the phosphorous and nitrogen cycle. [2 minutes]
Change is a constant of life. The natural cycles that balance and regulate the Earth and its atmosphere provide the necessary conditions for sustaining a diverse range of life forms on the planet. But what...
Twelve film clips, each covering a single chemical process, which describe how each process works, looking at raw materials, uses for the products, and the geographical siting of the plant. Topics are:...
A series of interactive practical chemistry programmes, with spoken commentary, quizzes and printable subtitles for commentaries. 1: Assembling apparatus, using stirrers, heating samples, using a rotary...
4 (72 min): Explores water purity, safety and the role that chemistry plays in managing the environment. Looks at water management from the maintenance of river water quality to the detailed chemistry of the...
19: Using a flame photometer, using an atomic absorption spectrometer, colorimetric analysis.
Looks at the way chemistry can play a helpful role in some very different aspects of survival: in India the recycling of equipment enables students to use what would otherwise be prohibitively expensive...
A CAL model of the nitrogen cycle that calculates the amounts of nitrogen in the major transformation of the nitrogen cycle in grazed grassland. It presents the results as a dynamic display, with which the...
The 1991 Christmas Lecture 1991 in which Dave Nicholls tells how air is liquified and separated, then shows the effect on materials of freezing in liquid nitrogen. Demonstrates the burning of materials from...
Concentrates on a suggested model for the operations of the two proteins of the nitrogenese enzyme which bacteria use to fix nitrogen. First shows how root modules of legumes possess nitrogen fixing...
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